linux: add ipv6 failed-policy routing action (by Jonas Gorski)

SVN-Revision: 36911

diff --git a/target/linux/generic/patches-3.10/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch b/target/linux/generic/patches-3.10/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
new file mode 100644 (file)
index 0000000..505bc2b
--- /dev/null
+++ b/target/linux/generic/patches-3.10/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
@@ -0,0 +1,263 @@
+diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
+index 005e2c2..a6a1df4 100644
+--- a/include/net/netns/ipv6.h
++++ b/include/net/netns/ipv6.h
+@@ -55,6 +55,7 @@ struct netns_ipv6 {
+       unsigned long            ip6_rt_last_gc;
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       struct rt6_info         *ip6_prohibit_entry;
++      struct rt6_info         *ip6_failed_policy_entry;
+       struct rt6_info         *ip6_blk_hole_entry;
+       struct fib6_table       *fib6_local_tbl;
+       struct fib_rules_ops    *fib6_rules_ops;
+diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
+index 51da65b..1429852 100644
+--- a/include/uapi/linux/fib_rules.h
++++ b/include/uapi/linux/fib_rules.h
+@@ -64,6 +64,10 @@ enum {
+       FR_ACT_BLACKHOLE,       /* Drop without notification */
+       FR_ACT_UNREACHABLE,     /* Drop with ENETUNREACH */
+       FR_ACT_PROHIBIT,        /* Drop with EACCES */
++      FR_ACT_RES9,
++      FR_ACT_RES10,
++      FR_ACT_RES11,
++      FR_ACT_FAILED_POLICY,   /* Drop with EPERM */
+       __FR_ACT_MAX,
+ };
+ 
+diff --git a/include/uapi/linux/icmpv6.h b/include/uapi/linux/icmpv6.h
+index e0133c7..dabfa1a 100644
+--- a/include/uapi/linux/icmpv6.h
++++ b/include/uapi/linux/icmpv6.h
+@@ -115,6 +115,7 @@ struct icmp6hdr {
+ #define ICMPV6_NOT_NEIGHBOUR          2
+ #define ICMPV6_ADDR_UNREACH           3
+ #define ICMPV6_PORT_UNREACH           4
++#define ICMPV6_FAILED_POLICY          5
+ 
+ /*
+  *    Codes for Time Exceeded
+diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
+index 7a2144e..8f643f1 100644
+--- a/include/uapi/linux/rtnetlink.h
++++ b/include/uapi/linux/rtnetlink.h
+@@ -203,6 +203,7 @@ enum {
+       RTN_THROW,              /* Not in this table            */
+       RTN_NAT,                /* Translate this address       */
+       RTN_XRESOLVE,           /* Use external resolver        */
++      RTN_FAILED_POLICY,      /* Failed ingress/egress policy */
+       __RTN_MAX
+ };
+ 
+diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
+index 26aa65d..2f66341 100644
+--- a/net/ipv4/fib_rules.c
++++ b/net/ipv4/fib_rules.c
+@@ -84,6 +84,10 @@ static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
+               err = -EACCES;
+               goto errout;
+ 
++      case FR_ACT_FAILED_POLICY:
++              err = -EPERM;
++              goto errout;
++
+       case FR_ACT_BLACKHOLE:
+       default:
+               err = -EINVAL;
+diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
+index 8f6cb7a..dbae75d 100644
+--- a/net/ipv4/fib_semantics.c
++++ b/net/ipv4/fib_semantics.c
+@@ -138,6 +138,10 @@ const struct fib_prop fib_props[RTN_MAX + 1] = {
+               .error  = -EINVAL,
+               .scope  = RT_SCOPE_NOWHERE,
+       },
++      [RTN_FAILED_POLICY] = {
++              .error  = -EPERM,
++              .scope  = RT_SCOPE_UNIVERSE,
++      },
+ };
+ 
+ static void rt_fibinfo_free(struct rtable __rcu **rtp)
+diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
+index 49616fe..e2845bd 100644
+--- a/net/ipv4/fib_trie.c
++++ b/net/ipv4/fib_trie.c
+@@ -2334,6 +2334,7 @@ static const char *const rtn_type_names[__RTN_MAX] = {
+       [RTN_THROW] = "THROW",
+       [RTN_NAT] = "NAT",
+       [RTN_XRESOLVE] = "XRESOLVE",
++      [RTN_FAILED_POLICY] = "FAILED_POLICY",
+ };
+ 
+ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
+diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
+index df97f0a..2bd33cc 100644
+--- a/net/ipv4/ipmr.c
++++ b/net/ipv4/ipmr.c
+@@ -181,6 +181,7 @@ static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp,
+       case FR_ACT_UNREACHABLE:
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
++      case FR_ACT_FAILED_POLICY:
+               return -EACCES;
+       case FR_ACT_BLACKHOLE:
+       default:
+diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
+index 2e1a432..c4413b2 100644
+--- a/net/ipv6/fib6_rules.c
++++ b/net/ipv6/fib6_rules.c
+@@ -69,6 +69,9 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
+       case FR_ACT_PROHIBIT:
+               rt = net->ipv6.ip6_prohibit_entry;
+               goto discard_pkt;
++      case FR_ACT_FAILED_POLICY:
++              rt = net->ipv6.ip6_failed_policy_entry;
++              goto discard_pkt;
+       }
+ 
+       table = fib6_get_table(net, rule->table);
+diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
+index 583e8d4..1e524da 100644
+--- a/net/ipv6/ip6mr.c
++++ b/net/ipv6/ip6mr.c
+@@ -166,6 +166,8 @@ static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
+               return -EACCES;
++      case FR_ACT_FAILED_POLICY:
++              return -EPERM;
+       case FR_ACT_BLACKHOLE:
+       default:
+               return -EINVAL;
+diff --git a/net/ipv6/route.c b/net/ipv6/route.c
+index 2b87418..864f5fe 100644
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -245,6 +245,24 @@ static const struct rt6_info ip6_prohibit_entry_template = {
+       .rt6i_ref       = ATOMIC_INIT(1),
+ };
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb);
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
++
++static const struct rt6_info ip6_failed_policy_entry_template = {
++      .dst = {
++              .__refcnt       = ATOMIC_INIT(1),
++              .__use          = 1,
++              .obsolete       = DST_OBSOLETE_FORCE_CHK,
++              .error          = -EPERM,
++              .input          = ip6_pkt_failed_policy,
++              .output         = ip6_pkt_failed_policy_out,
++      },
++      .rt6i_flags     = (RTF_REJECT | RTF_NONEXTHOP),
++      .rt6i_protocol  = RTPROT_KERNEL,
++      .rt6i_metric    = ~(u32) 0,
++      .rt6i_ref       = ATOMIC_INIT(1),
++};
++
+ static const struct rt6_info ip6_blk_hole_entry_template = {
+       .dst = {
+               .__refcnt       = ATOMIC_INIT(1),
+@@ -1459,6 +1477,9 @@ int ip6_route_add(struct fib6_config *cfg)
+               case RTN_THROW:
+                       rt->dst.error = -EAGAIN;
+                       break;
++              case RTN_FAILED_POLICY:
++                      rt->dst.error = -EPERM;
++                      break;
+               default:
+                       rt->dst.error = -ENETUNREACH;
+                       break;
+@@ -2035,6 +2056,17 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+       return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+ }
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb)
++{
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_INNOROUTES);
++}
++
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
++{
++      skb->dev = skb_dst(skb)->dev;
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_OUTNOROUTES);
++}
++
+ #endif
+ 
+ /*
+@@ -2240,7 +2272,8 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
+       if (rtm->rtm_type == RTN_UNREACHABLE ||
+           rtm->rtm_type == RTN_BLACKHOLE ||
+           rtm->rtm_type == RTN_PROHIBIT ||
+-          rtm->rtm_type == RTN_THROW)
++          rtm->rtm_type == RTN_THROW ||
++          rtm->rtm_type == RTN_FAILED_POLICY)
+               cfg->fc_flags |= RTF_REJECT;
+ 
+       if (rtm->rtm_type == RTN_LOCAL)
+@@ -2442,6 +2475,9 @@ static int rt6_fill_node(struct net *net,
+               case -EACCES:
+                       rtm->rtm_type = RTN_PROHIBIT;
+                       break;
++              case -EPERM:
++                      rtm->rtm_type = RTN_FAILED_POLICY;
++                      break;
+               case -EAGAIN:
+                       rtm->rtm_type = RTN_THROW;
+                       break;
+@@ -2692,6 +2728,8 @@ static int ip6_route_dev_notify(struct notifier_block *this,
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+               net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+               net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
++              net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
++              net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
+               net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+               net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+ #endif
+@@ -2952,6 +2990,17 @@ static int __net_init ip6_route_net_init(struct net *net)
+       net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+       dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
+                        ip6_template_metrics, true);
++
++      net->ipv6.ip6_failed_policy_entry =
++              kmemdup(&ip6_failed_policy_entry_template,
++                      sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
++      if (!net->ipv6.ip6_failed_policy_entry)
++              goto out_ip6_blk_hole_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.path =
++              (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
++      dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
++                       ip6_template_metrics, true);
+ #endif
+ 
+       net->ipv6.sysctl.flush_delay = 0;
+@@ -2970,6 +3019,8 @@ out:
+       return ret;
+ 
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
++out_ip6_blk_hole_entry:
++      kfree(net->ipv6.ip6_blk_hole_entry);
+ out_ip6_prohibit_entry:
+       kfree(net->ipv6.ip6_prohibit_entry);
+ out_ip6_null_entry:
+@@ -2987,6 +3038,7 @@ static void __net_exit ip6_route_net_exit(struct net *net)
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       kfree(net->ipv6.ip6_prohibit_entry);
+       kfree(net->ipv6.ip6_blk_hole_entry);
++      kfree(net->ipv6.ip6_failed_policy_entry);
+ #endif
+       dst_entries_destroy(&net->ipv6.ip6_dst_ops);
+ }
+@@ -3083,6 +3135,9 @@ int __init ip6_route_init(void)
+       init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+       init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+       init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
++      init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
++      init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
++              in6_dev_get(init_net.loopback_dev);
+   #endif
+       ret = fib6_init();
+       if (ret)

diff --git a/target/linux/generic/patches-3.8/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch b/target/linux/generic/patches-3.8/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
new file mode 100644 (file)
index 0000000..f4d7853
--- /dev/null
+++ b/target/linux/generic/patches-3.8/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
@@ -0,0 +1,263 @@
+Index: linux-3.8.13/include/net/netns/ipv6.h
+===================================================================
+--- linux-3.8.13.orig/include/net/netns/ipv6.h 2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/include/net/netns/ipv6.h      2013-06-10 14:14:20.898911309 +0200
+@@ -54,6 +54,7 @@
+       unsigned long            ip6_rt_last_gc;
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       struct rt6_info         *ip6_prohibit_entry;
++      struct rt6_info         *ip6_failed_policy_entry;
+       struct rt6_info         *ip6_blk_hole_entry;
+       struct fib6_table       *fib6_local_tbl;
+       struct fib_rules_ops    *fib6_rules_ops;
+Index: linux-3.8.13/include/uapi/linux/fib_rules.h
+===================================================================
+--- linux-3.8.13.orig/include/uapi/linux/fib_rules.h   2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/include/uapi/linux/fib_rules.h        2013-06-10 14:14:20.898911309 +0200
+@@ -64,6 +64,10 @@
+       FR_ACT_BLACKHOLE,       /* Drop without notification */
+       FR_ACT_UNREACHABLE,     /* Drop with ENETUNREACH */
+       FR_ACT_PROHIBIT,        /* Drop with EACCES */
++      FR_ACT_RES9,
++      FR_ACT_RES10,
++      FR_ACT_RES11,
++      FR_ACT_FAILED_POLICY,   /* Drop with EPERM */
+       __FR_ACT_MAX,
+ };
+ 
+Index: linux-3.8.13/include/uapi/linux/icmpv6.h
+===================================================================
+--- linux-3.8.13.orig/include/uapi/linux/icmpv6.h      2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/include/uapi/linux/icmpv6.h   2013-06-10 14:14:20.898911309 +0200
+@@ -115,6 +115,7 @@
+ #define ICMPV6_NOT_NEIGHBOUR          2
+ #define ICMPV6_ADDR_UNREACH           3
+ #define ICMPV6_PORT_UNREACH           4
++#define ICMPV6_FAILED_POLICY          5
+ 
+ /*
+  *    Codes for Time Exceeded
+Index: linux-3.8.13/include/uapi/linux/rtnetlink.h
+===================================================================
+--- linux-3.8.13.orig/include/uapi/linux/rtnetlink.h   2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/include/uapi/linux/rtnetlink.h        2013-06-10 14:14:20.898911309 +0200
+@@ -203,6 +203,7 @@
+       RTN_THROW,              /* Not in this table            */
+       RTN_NAT,                /* Translate this address       */
+       RTN_XRESOLVE,           /* Use external resolver        */
++      RTN_FAILED_POLICY,      /* Failed ingress/egress policy */
+       __RTN_MAX
+ };
+ 
+Index: linux-3.8.13/net/ipv4/fib_rules.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv4/fib_rules.c     2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv4/fib_rules.c  2013-06-10 14:14:20.898911309 +0200
+@@ -84,6 +84,10 @@
+               err = -EACCES;
+               goto errout;
+ 
++      case FR_ACT_FAILED_POLICY:
++              err = -EPERM;
++              goto errout;
++
+       case FR_ACT_BLACKHOLE:
+       default:
+               err = -EINVAL;
+Index: linux-3.8.13/net/ipv4/fib_semantics.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv4/fib_semantics.c 2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv4/fib_semantics.c      2013-06-10 14:14:20.898911309 +0200
+@@ -138,6 +138,10 @@
+               .error  = -EINVAL,
+               .scope  = RT_SCOPE_NOWHERE,
+       },
++      [RTN_FAILED_POLICY] = {
++              .error  = -EPERM,
++              .scope  = RT_SCOPE_UNIVERSE,
++      },
+ };
+ 
+ static void rt_fibinfo_free(struct rtable __rcu **rtp)
+Index: linux-3.8.13/net/ipv4/fib_trie.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv4/fib_trie.c      2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv4/fib_trie.c   2013-06-10 14:14:20.902911309 +0200
+@@ -2350,6 +2350,7 @@
+       [RTN_THROW] = "THROW",
+       [RTN_NAT] = "NAT",
+       [RTN_XRESOLVE] = "XRESOLVE",
++      [RTN_FAILED_POLICY] = "FAILED_POLICY",
+ };
+ 
+ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
+Index: linux-3.8.13/net/ipv4/ipmr.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv4/ipmr.c  2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv4/ipmr.c       2013-06-10 14:14:20.902911309 +0200
+@@ -181,6 +181,7 @@
+       case FR_ACT_UNREACHABLE:
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
++      case FR_ACT_FAILED_POLICY:
+               return -EACCES;
+       case FR_ACT_BLACKHOLE:
+       default:
+Index: linux-3.8.13/net/ipv6/fib6_rules.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv6/fib6_rules.c    2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv6/fib6_rules.c 2013-06-10 14:14:20.902911309 +0200
+@@ -69,6 +69,9 @@
+       case FR_ACT_PROHIBIT:
+               rt = net->ipv6.ip6_prohibit_entry;
+               goto discard_pkt;
++      case FR_ACT_FAILED_POLICY:
++              rt = net->ipv6.ip6_failed_policy_entry;
++              goto discard_pkt;
+       }
+ 
+       table = fib6_get_table(net, rule->table);
+Index: linux-3.8.13/net/ipv6/ip6mr.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv6/ip6mr.c 2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv6/ip6mr.c      2013-06-10 14:14:20.902911309 +0200
+@@ -166,6 +166,8 @@
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
+               return -EACCES;
++      case FR_ACT_FAILED_POLICY:
++              return -EPERM;
+       case FR_ACT_BLACKHOLE:
+       default:
+               return -EINVAL;
+Index: linux-3.8.13/net/ipv6/route.c
+===================================================================
+--- linux-3.8.13.orig/net/ipv6/route.c 2013-06-10 14:14:20.910911309 +0200
++++ linux-3.8.13/net/ipv6/route.c      2013-06-10 14:14:20.906911309 +0200
+@@ -258,6 +258,24 @@
+       .rt6i_ref       = ATOMIC_INIT(1),
+ };
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb);
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
++
++static const struct rt6_info ip6_failed_policy_entry_template = {
++      .dst = {
++              .__refcnt       = ATOMIC_INIT(1),
++              .__use          = 1,
++              .obsolete       = DST_OBSOLETE_FORCE_CHK,
++              .error          = -EPERM,
++              .input          = ip6_pkt_failed_policy,
++              .output         = ip6_pkt_failed_policy_out,
++      },
++      .rt6i_flags     = (RTF_REJECT | RTF_NONEXTHOP),
++      .rt6i_protocol  = RTPROT_KERNEL,
++      .rt6i_metric    = ~(u32) 0,
++      .rt6i_ref       = ATOMIC_INIT(1),
++};
++
+ static const struct rt6_info ip6_blk_hole_entry_template = {
+       .dst = {
+               .__refcnt       = ATOMIC_INIT(1),
+@@ -1516,6 +1534,9 @@
+               case RTN_THROW:
+                       rt->dst.error = -EAGAIN;
+                       break;
++              case RTN_FAILED_POLICY:
++                      rt->dst.error = -EPERM;
++                      break;
+               default:
+                       rt->dst.error = -ENETUNREACH;
+                       break;
+@@ -2110,6 +2131,17 @@
+       return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+ }
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb)
++{
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_INNOROUTES);
++}
++
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
++{
++      skb->dev = skb_dst(skb)->dev;
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_OUTNOROUTES);
++}
++
+ #endif
+ 
+ /*
+@@ -2321,7 +2353,8 @@
+       if (rtm->rtm_type == RTN_UNREACHABLE ||
+           rtm->rtm_type == RTN_BLACKHOLE ||
+           rtm->rtm_type == RTN_PROHIBIT ||
+-          rtm->rtm_type == RTN_THROW)
++          rtm->rtm_type == RTN_THROW ||
++          rtm->rtm_type == RTN_FAILED_POLICY)
+               cfg->fc_flags |= RTF_REJECT;
+ 
+       if (rtm->rtm_type == RTN_LOCAL)
+@@ -2524,6 +2557,9 @@
+               case -EACCES:
+                       rtm->rtm_type = RTN_PROHIBIT;
+                       break;
++              case -EPERM:
++                      rtm->rtm_type = RTN_FAILED_POLICY;
++                      break;
+               case -EAGAIN:
+                       rtm->rtm_type = RTN_THROW;
+                       break;
+@@ -2775,6 +2811,8 @@
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+               net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+               net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
++              net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
++              net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
+               net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+               net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+ #endif
+@@ -3037,6 +3075,17 @@
+       net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+       dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
+                        ip6_template_metrics, true);
++
++      net->ipv6.ip6_failed_policy_entry =
++              kmemdup(&ip6_failed_policy_entry_template,
++                      sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
++      if (!net->ipv6.ip6_failed_policy_entry)
++              goto out_ip6_blk_hole_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.path =
++              (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
++      dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
++                       ip6_template_metrics, true);
+ #endif
+ 
+       net->ipv6.sysctl.flush_delay = 0;
+@@ -3055,6 +3104,8 @@
+       return ret;
+ 
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
++out_ip6_blk_hole_entry:
++      kfree(net->ipv6.ip6_blk_hole_entry);
+ out_ip6_prohibit_entry:
+       kfree(net->ipv6.ip6_prohibit_entry);
+ out_ip6_null_entry:
+@@ -3072,6 +3123,7 @@
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       kfree(net->ipv6.ip6_prohibit_entry);
+       kfree(net->ipv6.ip6_blk_hole_entry);
++      kfree(net->ipv6.ip6_failed_policy_entry);
+ #endif
+       dst_entries_destroy(&net->ipv6.ip6_dst_ops);
+ }
+@@ -3168,6 +3220,9 @@
+       init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+       init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+       init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
++      init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
++      init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
++              in6_dev_get(init_net.loopback_dev);
+   #endif
+       ret = fib6_init();
+       if (ret)

diff --git a/target/linux/generic/patches-3.9/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch b/target/linux/generic/patches-3.9/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
new file mode 100644 (file)
index 0000000..254ab67
--- /dev/null
+++ b/target/linux/generic/patches-3.9/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch
@@ -0,0 +1,263 @@
+diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
+index 005e2c2..a6a1df4 100644
+--- a/include/net/netns/ipv6.h
++++ b/include/net/netns/ipv6.h
+@@ -55,6 +55,7 @@ struct netns_ipv6 {
+       unsigned long            ip6_rt_last_gc;
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       struct rt6_info         *ip6_prohibit_entry;
++      struct rt6_info         *ip6_failed_policy_entry;
+       struct rt6_info         *ip6_blk_hole_entry;
+       struct fib6_table       *fib6_local_tbl;
+       struct fib_rules_ops    *fib6_rules_ops;
+diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
+index 51da65b..1429852 100644
+--- a/include/uapi/linux/fib_rules.h
++++ b/include/uapi/linux/fib_rules.h
+@@ -64,6 +64,10 @@ enum {
+       FR_ACT_BLACKHOLE,       /* Drop without notification */
+       FR_ACT_UNREACHABLE,     /* Drop with ENETUNREACH */
+       FR_ACT_PROHIBIT,        /* Drop with EACCES */
++      FR_ACT_RES9,
++      FR_ACT_RES10,
++      FR_ACT_RES11,
++      FR_ACT_FAILED_POLICY,   /* Drop with EPERM */
+       __FR_ACT_MAX,
+ };
+ 
+diff --git a/include/uapi/linux/icmpv6.h b/include/uapi/linux/icmpv6.h
+index e0133c7..dabfa1a 100644
+--- a/include/uapi/linux/icmpv6.h
++++ b/include/uapi/linux/icmpv6.h
+@@ -115,6 +115,7 @@ struct icmp6hdr {
+ #define ICMPV6_NOT_NEIGHBOUR          2
+ #define ICMPV6_ADDR_UNREACH           3
+ #define ICMPV6_PORT_UNREACH           4
++#define ICMPV6_FAILED_POLICY          5
+ 
+ /*
+  *    Codes for Time Exceeded
+diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
+index 7a2144e..8f643f1 100644
+--- a/include/uapi/linux/rtnetlink.h
++++ b/include/uapi/linux/rtnetlink.h
+@@ -203,6 +203,7 @@ enum {
+       RTN_THROW,              /* Not in this table            */
+       RTN_NAT,                /* Translate this address       */
+       RTN_XRESOLVE,           /* Use external resolver        */
++      RTN_FAILED_POLICY,      /* Failed ingress/egress policy */
+       __RTN_MAX
+ };
+ 
+diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
+index 26aa65d..2f66341 100644
+--- a/net/ipv4/fib_rules.c
++++ b/net/ipv4/fib_rules.c
+@@ -84,6 +84,10 @@ static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
+               err = -EACCES;
+               goto errout;
+ 
++      case FR_ACT_FAILED_POLICY:
++              err = -EPERM;
++              goto errout;
++
+       case FR_ACT_BLACKHOLE:
+       default:
+               err = -EINVAL;
+diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
+index 8f6cb7a..dbae75d 100644
+--- a/net/ipv4/fib_semantics.c
++++ b/net/ipv4/fib_semantics.c
+@@ -138,6 +138,10 @@ const struct fib_prop fib_props[RTN_MAX + 1] = {
+               .error  = -EINVAL,
+               .scope  = RT_SCOPE_NOWHERE,
+       },
++      [RTN_FAILED_POLICY] = {
++              .error  = -EPERM,
++              .scope  = RT_SCOPE_UNIVERSE,
++      },
+ };
+ 
+ static void rt_fibinfo_free(struct rtable __rcu **rtp)
+diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
+index 49616fe..e2845bd 100644
+--- a/net/ipv4/fib_trie.c
++++ b/net/ipv4/fib_trie.c
+@@ -2343,6 +2343,7 @@ static const char *const rtn_type_names[__RTN_MAX] = {
+       [RTN_THROW] = "THROW",
+       [RTN_NAT] = "NAT",
+       [RTN_XRESOLVE] = "XRESOLVE",
++      [RTN_FAILED_POLICY] = "FAILED_POLICY",
+ };
+ 
+ static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
+diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
+index df97f0a..2bd33cc 100644
+--- a/net/ipv4/ipmr.c
++++ b/net/ipv4/ipmr.c
+@@ -181,6 +181,7 @@ static int ipmr_rule_action(struct fib_rule *rule, struct flowi *flp,
+       case FR_ACT_UNREACHABLE:
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
++      case FR_ACT_FAILED_POLICY:
+               return -EACCES;
+       case FR_ACT_BLACKHOLE:
+       default:
+diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
+index 2e1a432..c4413b2 100644
+--- a/net/ipv6/fib6_rules.c
++++ b/net/ipv6/fib6_rules.c
+@@ -69,6 +69,9 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
+       case FR_ACT_PROHIBIT:
+               rt = net->ipv6.ip6_prohibit_entry;
+               goto discard_pkt;
++      case FR_ACT_FAILED_POLICY:
++              rt = net->ipv6.ip6_failed_policy_entry;
++              goto discard_pkt;
+       }
+ 
+       table = fib6_get_table(net, rule->table);
+diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
+index 583e8d4..1e524da 100644
+--- a/net/ipv6/ip6mr.c
++++ b/net/ipv6/ip6mr.c
+@@ -166,6 +166,8 @@ static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
+               return -ENETUNREACH;
+       case FR_ACT_PROHIBIT:
+               return -EACCES;
++      case FR_ACT_FAILED_POLICY:
++              return -EPERM;
+       case FR_ACT_BLACKHOLE:
+       default:
+               return -EINVAL;
+diff --git a/net/ipv6/route.c b/net/ipv6/route.c
+index 2b87418..864f5fe 100644
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -245,6 +245,24 @@ static const struct rt6_info ip6_prohibit_entry_template = {
+       .rt6i_ref       = ATOMIC_INIT(1),
+ };
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb);
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
++
++static const struct rt6_info ip6_failed_policy_entry_template = {
++      .dst = {
++              .__refcnt       = ATOMIC_INIT(1),
++              .__use          = 1,
++              .obsolete       = DST_OBSOLETE_FORCE_CHK,
++              .error          = -EPERM,
++              .input          = ip6_pkt_failed_policy,
++              .output         = ip6_pkt_failed_policy_out,
++      },
++      .rt6i_flags     = (RTF_REJECT | RTF_NONEXTHOP),
++      .rt6i_protocol  = RTPROT_KERNEL,
++      .rt6i_metric    = ~(u32) 0,
++      .rt6i_ref       = ATOMIC_INIT(1),
++};
++
+ static const struct rt6_info ip6_blk_hole_entry_template = {
+       .dst = {
+               .__refcnt       = ATOMIC_INIT(1),
+@@ -1459,6 +1477,9 @@ int ip6_route_add(struct fib6_config *cfg)
+               case RTN_THROW:
+                       rt->dst.error = -EAGAIN;
+                       break;
++              case RTN_FAILED_POLICY:
++                      rt->dst.error = -EPERM;
++                      break;
+               default:
+                       rt->dst.error = -ENETUNREACH;
+                       break;
+@@ -2035,6 +2056,17 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+       return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+ }
+ 
++static int ip6_pkt_failed_policy(struct sk_buff *skb)
++{
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_INNOROUTES);
++}
++
++static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
++{
++      skb->dev = skb_dst(skb)->dev;
++      return ip6_pkt_drop(skb, ICMPV6_FAILED_POLICY, IPSTATS_MIB_OUTNOROUTES);
++}
++
+ #endif
+ 
+ /*
+@@ -2240,7 +2272,8 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
+       if (rtm->rtm_type == RTN_UNREACHABLE ||
+           rtm->rtm_type == RTN_BLACKHOLE ||
+           rtm->rtm_type == RTN_PROHIBIT ||
+-          rtm->rtm_type == RTN_THROW)
++          rtm->rtm_type == RTN_THROW ||
++          rtm->rtm_type == RTN_FAILED_POLICY)
+               cfg->fc_flags |= RTF_REJECT;
+ 
+       if (rtm->rtm_type == RTN_LOCAL)
+@@ -2442,6 +2475,9 @@ static int rt6_fill_node(struct net *net,
+               case -EACCES:
+                       rtm->rtm_type = RTN_PROHIBIT;
+                       break;
++              case -EPERM:
++                      rtm->rtm_type = RTN_FAILED_POLICY;
++                      break;
+               case -EAGAIN:
+                       rtm->rtm_type = RTN_THROW;
+                       break;
+@@ -2692,6 +2728,8 @@ static int ip6_route_dev_notify(struct notifier_block *this,
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+               net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+               net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
++              net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
++              net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
+               net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+               net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+ #endif
+@@ -2952,6 +2990,17 @@ static int __net_init ip6_route_net_init(struct net *net)
+       net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+       dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
+                        ip6_template_metrics, true);
++
++      net->ipv6.ip6_failed_policy_entry =
++              kmemdup(&ip6_failed_policy_entry_template,
++                      sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
++      if (!net->ipv6.ip6_failed_policy_entry)
++              goto out_ip6_blk_hole_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.path =
++              (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
++      net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
++      dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
++                       ip6_template_metrics, true);
+ #endif
+ 
+       net->ipv6.sysctl.flush_delay = 0;
+@@ -2970,6 +3019,8 @@ out:
+       return ret;
+ 
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
++out_ip6_blk_hole_entry:
++      kfree(net->ipv6.ip6_blk_hole_entry);
+ out_ip6_prohibit_entry:
+       kfree(net->ipv6.ip6_prohibit_entry);
+ out_ip6_null_entry:
+@@ -2987,6 +3038,7 @@ static void __net_exit ip6_route_net_exit(struct net *net)
+ #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+       kfree(net->ipv6.ip6_prohibit_entry);
+       kfree(net->ipv6.ip6_blk_hole_entry);
++      kfree(net->ipv6.ip6_failed_policy_entry);
+ #endif
+       dst_entries_destroy(&net->ipv6.ip6_dst_ops);
+ }
+@@ -3083,6 +3135,9 @@ int __init ip6_route_init(void)
+       init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+       init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+       init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
++      init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
++      init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
++              in6_dev_get(init_net.loopback_dev);
+   #endif
+       ret = fib6_init();
+       if (ret)